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Yikang Zheng, Yibo Wang, X. Chang (2019)
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Developing a mathematical method for evaluating the reliability of imaging results in seismic data processing is essential for further advancing methods for active fault exploration based on accurately locating the spatial position and fi ne structures of faults. This study introduces demigration—a technique that is the inverse of seismic wave migration—into seismic data processing for active fault exploration. By analyzing the relationship between migration and demigration, a high-precision fl ow for the processing of active source seismic exploration data is proposed. This flow involves prestack depth-domain reverse time migration and wave equation–based demigration. This study focuses on processing the exploration data of complex fault structures, such as growth faults and flower structures. Processing results demonstrate that the proposed processing fl ow for seismic data eff ectively enhances the accuracy and reliability of the seismic imaging profiles of active faults. The introduction of seismic data processing operators for migration and demigration (which are inverse operations) into the fi eld of active fault seismic exploration is expected to improve the accuracy and resolution of results considerably. The proposed technique can be used for the high-precision imaging of seismic data before joint geological drilling or other scientific drilling research. By combining multiple mathematical means for cross-checking, it can effectively ensure the positioning accuracy of the uppermost point of a fault, thereby reducing corresponding drilling costs.
Applied Geophysics – Springer Journals
Published: Jun 1, 2023
Keywords: Active fault seismic exploration; prestack depth migration; demigration; seismic velocity modeling; active source seismic imaging
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